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NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

SOLE VOTING POWER

2,730,765

SHARED VOTING POWER

0

SOLE DISPOSITIVE POWER

2,730,765

SHARED DISPOSITIVE POWER

0

Accession Number:: 0001193125-22-140615
Form Type:: 13D Filing
Publication Date:: 2022-05-03 20:00:00

Filed By:: Clarus Lifesciences I, L.p.
Company:: Sientra Inc. (NASDAQ:SIEN)
Filing Date:: 2022-05-04
SEC Url:: 13D Filing

Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name	Sole Voting Power	Sole Dispositive Power	Aggregate Amount Owned Power	Percent of Class
Clarus Lifesciences I	2,730,765	2,730,765	2,730,765	4.4%
Clarus Ventures I Management	2,730,765	2,730,765	2,730,765	4.4%
Blackstone Clarus I	2,730,765	2,730,765	2,730,765	4.4%
Blackstone Holdings II	2,730,765	2,730,765	2,730,765	4.4%
Blackstone Holdings I II GP	2,730,765	2,730,765	2,730,765	4.4%
Blackstone Inc	2,730,765	2,730,765	2,730,765	4.4%
Blackstone Group Management	2,730,765	2,730,765	2,730,765	4.4%
Stephen A. Schwarzman	2,730,765	2,730,765	2,730,765	4.4%

Filing

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

Sientra, Inc.

(Name of Issuer)

Common Stock, $0.01 par value per share

(Title of Class of Securities)

82621J105

(CUSIP Number)

Robert Liptak

Clarus Ventures, LLC

101 Main Street, Suite 1210

Cambridge, MA 02142

(617) 949-2200

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

May 4, 2022

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule §240.13d-7 for other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 82621J105		13D		Page 2 of 14 Pages


1		NAMES OF REPORTING PERSONS. Clarus Lifesciences I, L.P.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) WC
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 3 of 14 Pages


1		NAMES OF REPORTING PERSONS. Clarus Ventures I Management, L.P.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 4 of 14 Pages


1		NAMES OF REPORTING PERSONS. Blackstone Clarus I L.L.C.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 5 of 14 Pages


1		NAMES OF REPORTING PERSONS. Blackstone Holdings II L.P.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 6 of 14 Pages


1		NAMES OF REPORTING PERSONS. Blackstone Holdings I/II GP L.L.C.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 7 of 14 Pages


1		NAMES OF REPORTING PERSONS. Blackstone Inc.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 8 of 14 Pages


1		NAMES OF REPORTING PERSONS. Blackstone Group Management L.L.C.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


CUSIP No. 82621J105		13D		Page 9 of 14 Pages


1		NAMES OF REPORTING PERSONS. Stephen A. Schwarzman
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ☐ (b) ☒
3		SEC USE ONLY
4		SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5		CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ☐
6		CITIZENSHIP OR PLACE OF ORGANIZATION United States of America


CUSIP No. 82621J105		13D		Page 10 of 14 Pages

This Amendment No. 1 (Amendment) to the statement on Schedule 13D amends and supplements the initial statement on Schedule 13D filed with the Securities and Exchange Commission on January 11, 2019 (as amended, the Schedule 13D), relating to the shares of Common Stock, par value $0.01 per share (the Common Stock), of Sientra, Inc. (the Issuer).

Certain terms used but not defined in this Amendment have the meanings assigned thereto in the Schedule 13D. Except as specifically provided herein, this Amendment does not modify any of the information previously reported in the Schedule 13D. This Amendment constitutes an exit filing of the Reporting Persons, in respect of the Common Stock beneficially owned by the Reporting Persons.

Item 2. Identity and Background.

Item 2 of the Schedule 13D is hereby amended by incorporating herein by reference the information set forth on the updated Schedule I attached hereto.

Item 4. Purpose of Transaction

Item 4 of the Schedule 13D is hereby amended and supplemented as follows:

Nicholas Simon, an employee of Blackstone Inc. or its affiliates, no longer serves on the board of directors of the Issuer.

Item 5. Interest in Securities of the Issuer.

Item 5 of the Schedule 13D is hereby amended and restated as follows:

(a) and (b). Calculations of the percentage of Common Stock beneficially owned is based upon 62,606,616 shares of Common Stock outstanding as of April 12, 2022, as reported in the Issuers Definitive Proxy Statement filed with the Securities and Exchange Commission on April 29, 2022.

The aggregate number and percentage of shares of Common Stock beneficially owned by each Reporting Person and, for each Reporting Person, the number of shares of Common Stock as to which there is sole power to vote or to direct the vote, shared power to vote or to direct the vote, sole power to dispose or to direct the disposition, or shared power to dispose or to direct the disposition are set forth on rows 7 through 11 and row 13 of the cover pages of this Schedule 13D and are incorporated herein by reference.

As of the date hereof, Clarus Lifesciences I, L.P. (the Fund) directly owns 2,730,765 shares of Common Stock. Not included on this Schedule 13D are 84,699 shares of Common Stock held by Nicholas Simon for the benefit of the Fund.

Clarus Ventures I Management, L.P. (Clarus GP) is the general partner of the Fund. Blackstone Clarus I L.L.C. is the general partner of Clarus GP. The sole member of Blackstone Clarus I L.L.C. is Blackstone Holdings II L.P. The general partner of Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstones senior managing directors and controlled by its founder, Stephen A. Schwarzman.

Neither the filing of this Schedule 13D nor any of its contents shall be deemed to constitute an admission that any of the Reporting Persons (other than the Fund) is the beneficial owner of the shares of Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the Exchange Act), or for any other purpose, and such beneficial ownership is expressly disclaimed (other than by the Fund). The filing of this statement should not be construed to be an admission that any member of the Reporting Persons are members of a group for the purposes of Sections 13(d) and 13(g) of the Exchange Act.

(d) To the best knowledge of the Reporting Persons, no person other than the Reporting Persons, or the partners, members, affiliates or shareholders of the Reporting Persons, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities beneficially owned by the Reporting Persons identified in this Item 5.

(e) The Reporting Persons no longer beneficially own more than five percent of the Common Stock.

SIGNATURE

After reasonable inquiry and to the best of its or his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Date: May 4, 2022


CLARUS LIFESCIENCES I, L.P.
By: Clarus Ventures I Management, L.P., its general partner
By: Blackstone Clarus I L.L.C., its general partner

By:		/s/ Omar Rehman
Name:		Omar Rehman
Title:		Chief Compliance Officer and Secretary


CLARUS VENTURES I MANAGEMENT, L.P.
By: Blackstone Clarus I L.L.C., its general partner

By:		/s/ Omar Rehman
Name:		Omar Rehman
Title:		Chief Compliance Officer and Secretary


BLACKSTONE CLARUS I L.L.C.

By:		/s/ Omar Rehman
Name:		Omar Rehman
Title:		Chief Compliance Officer and Secretary


BLACKSTONE HOLDINGS II L.P.
By: Blackstone Holdings I/II GP L.L.C., its general partner

By:		/s/ Tabea Hsi
Name:		Tabea Hsi
Title:		Senior Managing Director


BLACKSTONE HOLDINGS I/II GP L.L.C.

By:		/s/ Tabea Hsi
Name:		Tabea Hsi
Title:		Senior Managing Director


BLACKSTONE INC.
By: Blackstone Group Management L.L.C., its general partner

By:		/s/ Tabea Hsi


Name:		Tabea Hsi
Title:		Senior Managing Director


BLACKSTONE GROUP MANAGEMENT L.L.C.

By:		/s/ Tabea Hsi


Name:		Tabea Hsi
Title:		Senior Managing Director

/s/ Stephen A. Schwarzman

Stephen A. Schwarzman

SCHEDULE I

Executive Officers and Directors of Blackstone Inc.

The name and principal occupation of each director and executive officer of Blackstone Inc. are set forth below. The address for each person listed below is c/o Blackstone Inc., 345 Park Avenue, New York, New York 10154. All executive officers and directors listed are United States citizens other than The Right Honourable Brian Mulroney, who is a citizen of Canada, and Sir John Antony Hood, who is a citizen of New Zealand.

OFFICERS:


Name		Present Principal Occupation or Employment

Stephen A. Schwarzman		Founder, Chairman and Chief Executive Officer of Blackstone Inc.

Jonathan D. Gray		President, Chief Operating Officer of Blackstone Inc.

Michael S. Chae		Chief Financial Officer of Blackstone Inc.

John G. Finley		Chief Legal Officer of Blackstone Inc.

DIRECTORS:


Name		Present Principal Occupation or Employment

Stephen A. Schwarzman		Founder, Chairman and Chief Executive Officer of Blackstone Inc.

Jonathan D. Gray		President, Chief Operating Officer of Blackstone Inc.

Kelly A. Ayotte		Former United States Senator from New Hampshire

Joseph P. Baratta		Global Head of Private Equity at Blackstone Inc.

James W. Breyer		Founder and Chief Executive Officer of Breyer Capital

Reginald J. Brown		Partner for the law firm, Kirkland & Ellis

Sir John Antony Hood		Former President and Chief Executive Officer of the Robertson Foundation and Former Chair of the Rhodes Trust

Rochelle B. Lazarus		Chairman Emeritus & Former Chief Executive Officer, Ogilvy & Mather Worldwide

Jay O. Light		Dean Emeritus, Harvard Business School

The Right Honourable Brian Mulroney		Senior Partner for the Montreal law firm, Norton Rose Fulbright Canada LLP

William G. Parrett		Retired CEO of Deloitte Touche Tohmatsu and retired Senior Partner of Deloitte (USA)

Ruth Porat		Chief Financial Officer of Alphabet Inc. and Google Inc.